Circuit Breaker (Switch) Tester

Circuit Breaker Contact resistance tester

type:ZC-302D

The tester bases on the combination of High-frequency switching power supply technology and digital circuit technology. It is suitable for measurement of loop resistance of Switching Control Equipment. the tester can measure the loop resistance and display in the monitor. Its accuracy and stability meet most power systems’ requirements in maintenance and loop resistance of high-voltage switches.

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  • Product Introduction

ZC-302D-100A Contact Resistance Tester meets the criteria of the latest power system standard--DL/T845.4-2004. The tester bases on the combination of High-frequency switching power supply technology and digital circuit technology. It is suitable for measurement of loop resistance of Switching Control Equipment. Test current of the Tester is DC-100mA which is recommended in the national standards. The Tester can measure the loop resistance and display in the monitor. Its accuracy and stability meet most power systems’ requirements in maintenance and loop resistance of high-voltage switches.

  • Product Parameters
Mearsurement range1-1999µΩ
Resolution1µΩ
Test currentDC 20—120A
Accuracy5%±1d
Display currentThree half -LCD
ResistanceThree half -LCD
Power supplyAC220V±10%     50Hz
Working envrionment temperature -10ºC-40ºC
Humidity≤80%RH
Size300*270*200mm
Weight5Kg( Accessories excluded)   


  • Product Features

High current: For latest technology of battery, the tester can output sequential high current which overcome the difficulties in instantaneous current of pulsed power. It can effectively Breakdown the oxide layer between the switches and then get more precise results.


Strong anti-interference ability: the last number of test data showed in the LCD screen ranges ±1 even in strong Interference situation.


Long service life: all of the precise resistances used in the tester can reduce The temperature’s impact on the measurement results and military connectors can enhance vibration resistance.


Convenience: smaller and lighter.


  • Product Video

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